Paper Title:
Simulation of Recrystallization Using Molecular Dynamics; Effects of the Interatomic Potential
  Abstract

Recrystallization is governed by the migration of high angle grain boundaries traveling through a deformed material driven by the excess energy located primarily in dislocation structures. A method for investigating the interaction between a migrating grain boundary and dislocation boundaries using molecular dynamics (MD) was recently developed. During simulations migrating high angle grain boundaries interact with dislocation boundaries, and individual dislocations from the dislocation boundaries are absorbed into the grain boundaries. Results obtained previously, using a simple Lennard-Jones (LJ) potential, showed surprisingly irregular grain boundary migration compared to simulations of grain boundary migration applying other types of driving forces. Inhomogeneous boundary-dislocation interactions were also observed in which the grain boundaries locally acquired significant cusps during dislocation absorption events. The study presented here makes comparisons between simulations performed using a LJ- and an embedded atom method (EAM) aluminum potential. The results show similarities which indicate that it is the crystallographic features rather than the atomic interactions that determine the details of the migration process.

  Info
Periodical
Materials Science Forum (Volumes 558-559)
Edited by
S.-J.L. Kang, M.Y. Huh, N.M. Hwang, H. Homma, K. Ushioda and Y. Ikuhara
Pages
1081-1086
DOI
10.4028/www.scientific.net/MSF.558-559.1081
Citation
R. B. Godiksen, Z. T. Trautt, M. Upmanyu, S. Schmidt, D. Juul Jensen, "Simulation of Recrystallization Using Molecular Dynamics; Effects of the Interatomic Potential", Materials Science Forum, Vols. 558-559, pp. 1081-1086, 2007
Online since
October 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Naoki Takata, Kenichi Ikeda, Fusahito Yoshida, H. Nakashima, Hiroshi Abe
Abstract:In the present study, grain boundary energy and atomic structure of <110> symmetric tilt boundaries in copper were evaluated by molecular...
807
Authors: Tomotsugu Shimokawa, Toshiyasu Kinari, Sukenori Shintaku
Abstract:The interactions between edge dislocations and the grain boundary have been studied by using quasicontinuum simulations. With an increase in...
973
Authors: Tokuteru Uesugi, Y. Inoue, Yorinobu Takigawa, Kenji Higashi
Abstract:The grain boundary surface is the excess energy of the grain boundary as the lattice on one side of the grain is translated relative to the...
331
Authors: Myrjam Winning
Abstract:It is shown that an externally applied mechanical stress field can change the kinetics of individual grain boundaries. Moreover, such...
987
Authors: Abhijit P. Brahme, Joseph M. Fridy, Anthony D. Rollett
Abstract:A model has been constructed for the microstructural evolution that occurs during the annealing of aluminum alloys. Geometric and...
1057